Odd issue with AIX 5.2 terminals

When I try to run some commands the terminal just stops responding. In 10 minutes the session is closed by inactivity on the network.
Not every user has this issue. A contractor was able to determine that the commands don't actually stop, just the terminal I/O quits. At this point the terminal is blocked. It seems for those terminals affected, when ever there is more than 15 or so lines of I/O they quit responding. We are all using Eterm and Telnet. My terminal session has not been affected at all and the console the only direct connection has never been affected. This issue is on two systems restored from sysbaks.

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It could be a problem of the telnet service.. .not of TMOUT variable value.
If you are using some telnet client like putty then you can fix the problem
by sending keepalive packs to the servers (like pings).. try to check it out
on connections options..
It worked for me.

I've used ETerm, Hyperterminal and Telnet. The problem is that the system keeps running, but the session just stops. I'm beginning to believe it may be a device driver. I had to restore a sysback from a 9131-P54 to a 9113-P550. I've never even seen this kind of issue.

Sorry it took so long to get back.. The issue is still happening, and no changes that I make to the telnet session seem to have an effect. When I do an ls -al , the terminal quits responding, but if I use one of the "immune" terminals, I can see the pts at ksh. However if I echo to it, nothing is shown by the hung process. It looks like STDIN & STDOUT get lost. Weird.

This is really beginning to bug me... I'm believing that this is related to telnet. I know that I had some missing filesets with tcp, and have resolved those. It still does it. I get no error messages, it just hangs. Does anyone have any idea what logs I can check to see whats happening?

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